Electrically-operated steam boiler



April 13, 1926. 1,580,293

1 A. FlTzER I ELECTRICALLY OPERATED STEAM BOILER- I Filed Feb. 9, 1925 INVENTOR. f7 F1720 EEE Y .Y r ATTORNEY.

- electrically loperated coil YPatented pr. 13, 1926.

'.IIiOllJ'IS A. IEI'I'IZIEB,v OF LOS ANGELES, CALIFORNIA.

ELEc'rBIcALLYv-ornnarnn STEAM' norma.

Application 'led February 9, 1925. Serial No.

T o all whom it mayconcern.'

Be it known that I, LOUIS A. Frrznn, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented acertain new and useful Improvement in Electrically- Operated Steam Boilers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawinffs. A

This invention relates to steam boilers.

The general object of the invention is to provide a steam boiler` wherein an electric heating means is arranged to be loperated to produce steam in the boiler.

A further object'of the inventionis to provide a steam boiler wherein a hollow drum is provided and wherein an electrically operated heating coil is disposed in the bottom of the drum for the purpose ofproducing steam. j

Another object of the invention is to provide a boiler wherein anelectrically operated coil is mounted adjacent the bottom of the boiler and wherein means is evaporating condensate present in the boiler.

A further object of the invention is to provide a boiler including an outer shell and an provided for discharging i water upon the heating coil toA vaporize the water.

A further object of the invention is to provide a steam boiler wherein a device operated by steam pressure within the boiler serves to control the flow of water to the boiler. l

A further object of the invention is to provide an electrically operated boiler wherein a thermostat associated with the heating element controls vthe water supply.

Other objects of the invention will beapparent from the following description taken in connection with the accompanying drawings wherein Fig. 1 is asection partly in elevation showing my boiler; Fig. 2 is a sectional detail showing means for mounting the heating element 1n the boiler; Fig. 3 is a top plan view of the lower portion of the boiler shell showing 'the heating element; Fig. 4 is an end view of the nozzle; and Fig. 5 is a sectional detail partly in lelevation showing the water control valve.

Referring to the drawing by reference characters, I have shown a boiler zit-10. As indicated, this boiler comprises a body portion'-1I1 having end provided for p wherein means is p which is operatively;

caps 14 and 15 thereon. ,l Arrangedv vcentrally within the end cap 14, I .show a heating element 16. Thisheatin` element may be of any desired Vmateria whichcan be efficiently heated by the passage of an electric current therethrough. I The heating element 16 is preferably made by bending :a rod or bar tothe lshape shown in Fig. 3 with the lower portion dished or .65 bent downwardly as shown in Fig. 1. The two terminals of the heating element are con'u nected 'to fastening means such as bolts 2U. One of these bolts is preferably of brass and the othe'rof iron and these bolts are each 70 provided with headed portions 21 and nuts 22. Immediately beneath ythe heating coil'. 16 I arrange'a mica plate 23 and beneath this plate I arrange an asbestos-plate 24.E f

Both of the plates as well as the coil' are 75 spaced above the shell 14 b an insulated block 25. This block'is provi ed with a' companion insulatingmember 26 as shown in Fig. 2. The bolts 20 are 1n circuit through. l

leads 30 and 31 with a battery or other somice:y

of electricity 32.,

The end cap 14 of the boiler, is provided..vr j

' with an aperture through which a. water sup ply pipe 37 extends. This supply pipe isrovided with a nozzle 38whichis` dispo l above the heating element 16 and is adaptedf to( direct water toward the heating'velement. The pipe 37 communicates with the'.} oipe4 4U which in turn, is [connected with a'pipelil, the latter being connected to' a pump, 42 to and a water supply pipe 43. The arrangement is such .that when the pump is operated it will force water throughthe nozzle 3S causing it to be directed towards the heating unit 16 where here mention that in the action of l'my invenn tion when.v the heating elementffis properly operating that the water will not strikethis element 1n any quantity, but will be vaporized just before it reaches the heating element. The Water will be pro elled in the form of a fine mist or spray un er high pressure. f

In order that the'water will not be acci dently supplied to the boilerbefore the heat- -noid 47 `controls a' valve 48 which allows water to'enter the boiler.

it will be vaporized. I may a5, i

'the latter being exposed to the steam pressure Within the boilern "lhe arrangement of parts is such that when thesteam pressure increases in the boiler the piston 55 vvill be s. driven out against the `action of a spring 56 thus rocking the leverml and actuating the rheostat to operate the coil 52, and thus change thel amount or water fed vto the boiler, As the 'pressure ol steam in the boiler decreases due to the diminished supply ot Water, the'spring 56 pushes the piston 55 invvardly thus again moving the rheostat 53 and increasing the supply orwater.

"'llhe boiler may be provided with the usual pressure indicator 60 .and pop valve 6l.

F rom the foregoing description it vvill be apparent that ll have provided a boiler which is'oraextremely simple construction, which may be economically made, and which is highly ecient in use. n

laving thus described my invention, l

l., lln aboiler, a closed shell, a heating element in said shell, said heating element comprising electrically heated means, said means being secured to said shell and insulated therefrom, means to bring Water into said shell to cause evaporation thereof and means to take steam from said shell.

2. lln a boiler, a boiler shell, an electricallyl operated heating element in said shell, said heating element being insulated from said shell, means toA inject Water into said shell, `vvires iconnecting said element with a source of electricity, and means 'to control thedovv of Water to said boiler, said last mentioned means comprising a device governed by the steam pressure in the boiler. v

3. lln a boiler, boiler shell, an electrically operated heating element Within said shell and insulated therefrom, means to inject T@vater into said shell, and means to prevent the dow of Water to said shell unless said element is above a certain temperature. el; ln a boiler, a boiler shell, a heating element in one end ot said shell, said heating element comv risin an electricallo eratede .Y P

heating coil spaced from and insulated from said shell, terminals 'lor said coil, a nozzle adjacent said heating coil, a vvater supply pipe leading to said nozzle and means to prevent passage of Water through said pipe weones until the hea-ting coil reaches a certain temone end thereof, said heating element comprisingan electrically operated heating coil, said coil having some parts thereof higher than other partsthereof, a nozzle adjacent said heating coil, a Water supply pipe leading to said nozzle, means for forcing'vvater through said supply pipe, towards said coil, said coil being spaced from the adjacent portion of said shell, and insulating material between the coil and the shell.

6. ln a boiler, a boiler shell, a heating element near one end of saidshell, said heating element comprising an electrically operated heating coil, said coil being dished in tne middle, terminals for said coil insulated l'froin said boiler shell, a nozzle adjacent to said heating coil, a Water supply pipe leading to said nozzle, a pump tor forcing Water through said supply pipe, said coil being spaced from the adjacent portion of said shell, and heat insulating material between the coil and the shell.,

7. ,'llie'method of producing steam comprising electrically heating an element Which is arranged Within a closed container, directing Water in a finely divided spray upon said element and withdrawing the steam from 'the container.

8. lln a boiler, a boiler shell, a heating element arranged within operated heating coil, terminals for said coil, said terminals passing through said shell and being insulated therefrom, a nozzle adjacent said heating coil, a Water supply pipe leading to said nozzle and a. pump for forcing Water through said supply pipe, said Water being' adapted to impinge upon said coil. Y

9. ln a boiler, a cylindrical boilershell, a heating element in one end of said shell, said heating element comprising an electrically operated heating coil, means to supply current to the element, a nozzle adjacent said heating coil, a Water supply pipe leading to said nozzle, means for forcing Water through said supply pipe, a valve in said supply pipe, means to control said valve, said last mentioned means including a rheolstat and means whereby the rheostat is controlled by the steam pressure in the boiler.

lln testimony Whereoll hereunto ailix my signature.` l

'Louis a. rrrznn.

said shell, said. heating element comprising anl electrically 

